Allen d



(No Model.)

A. D. LINN & A. A. LYTLE.

TABLET ARM.

No. 592,471. Patented Oct. 26,1897.

fave 7560 n8 fl. .12 .1; ytle STATES ALLEN D. LINN AND ALTON A. LYTLE,OF GRAND RAPIDS, MICHIGAN, ASSIGNORS TO THE GRAND RAPIDS SCHOOLFURNITURE COMPANY,

OF SAME PLACE.

TABLET-ARM.

SPECIFICATION forming part of Letters Patent No. 592,471, dated October26, 1897. A

Application filed March 24:, 1896.

Toall whom it HI/(LU concern:

Be it known that we, ALLEN D. LINN and ALTON A. LYTLE, citizens of theUnited States, residing at Grand Rapids, in the county of Kent and Stateof Michigan, have invented certain new and useful Improvements inTablet-Arms, of which the following is a specification, reference beinghad therein to the accompanying drawings.

Our invention relates to improvements in tablet-arms designed forconnecting a tablet or support to chairs and seats to adapt them for usein lecture-halls and similar places.

The object of our invention is to provide a form of connection whichshall be automatic in its operation to hold the tablet in an elevatedposition ready for use or to permit the tablet to drop down out of theway. We have also aimed to provide a joint which shall be neat andsightly in its appearance and in harmony with the general appearance ofthe chair, one in which there are no projections to catchin and tear theclothing, and in which also all the parts are incased.

"We have illustrated the invention in the accompanying drawings, inwhich- Figure 1 is a side elevation of a portion of a chair-arm, showingthe tablet-arm in posi-. tion for use, parts being broken away. Fig. 2is a similar view showing the tablet-arm partly raised to release thepawl and permit the tablet to be dropped down out of the way. Fig. 3 isa similar view showing the tabletarm in its lowered position. Fig. 4 isa sectional view of the joint. Figs. 5, 6, and 7 rep resent detacheddetails.

Referring more particularly to the figures, A represents the arm of theseat or chair,and B the arm which supports the tablet The chairarm A isprovided with a trunnion a, upon which the arm B hinges or turns. Arecess a is formed in the face of the chair-arm A, and a pawl D has anoffset or lateral extension d, which enters this recess and forms apivot upon which the pawl swings. The end d of the pawl is adapted tocome in contact with a stud or projection c on the inner periphery ofthe tablet-arm, which is hollowed out, as shown in section, to form acasing for containin g the pawl, and when the pawl is thus in contactwith the stud e, as shown in Fig. 1, the tablet-arm is held up inposition convenient for use. hen it is desired to drop the Serial No.584,683. (No model.)

tablet-arm out of the way, the arm is simply raised to the positionshown in Fig. 2, when a cam or stud 6, also formed on the inner face ofthe hollow portion of the tablet-arm, comes in contact with the oppositeend or tailpiece d of the pawl and tips the pawl, throwing its end dinward out of the path of the stud 6, so that when the arm is lowered itis permitted to drop down into the position shown in Fig. 3 out of theway. In this position, however, a third stud or projection f comes incontact with the pawl and swings its end d outward against the innerface of the 0011- tainingchamber, so that when the tablet-arn1 is againraised the projection erides over the pawl and is engaged thereby andthus holds the tablet-arm in its elevated position.

The parts are so arranged that the pawl acts by gravity, thus doing awaywith the use of springs, and as the parts occupy but little space andare contained entirely within the recess in the tablet-arm a compact andsightly joint is presented and one which is extremely simple, durable,and effective.

The two arms are held together by a bolt G, passing through an openingin the parts, a spring-washer being placed beneath the nut, as shown atr, the face of the arm being concaved to allow the spring-washer toplace a yielding tension upon the parts.

Having thus described our invention, what we claim is In combination, aseat-arm having a flat face, a tablet-arm pivoted thereto having anannular flange with its edges resting against said flat face, a pawlpivoted to said flat face to one side of and below the pivot of thetablet-arm, a projection extending inwardly from said flange adapted tobe engaged by the end of said pawl to support said tabletarm in ahorizontal position, a second projection on the flange for releasing thepawl,'and a lug on the tablet-arm adapted to return the pawl to normalposition, substantially as described.

In testimony whereof we affix our signatures in presence of twowitnesses.

ALLEN D. LINN. ALTON A. LYTLE.

\Vitnesses:

L. T. GIBSON, J. H. MEGREW.

